so i bought the original for android. how to i get the 2.0 one?
If you bought it on here, you can download dice-beta-200-itch.apk and install that, but unfortunately the dev doesn't seem to have set up betas on Google Play as of yet, so without buying it again you're out of luck. (Not sure if Google obstructs indie devs from submitting betas or something, wouldn't surprise me)
If you are on a playstore or emulator and aren't sure where to get the 2.0 update you can go to the discord server and in info tab you can find how to access it, I bought it on playstore on my phone and then downloaded the apk for bluestacks (Provided in the discord server), used restore purchase when clicking on the right side menu and now I have full 2.0 version on bluestacks, my guess is it will work similarly on your actual phone.
Do be careful though, save files might have some issues since you also have to delete old version of the game if you have it installed